[coldtea]

>I know you need to go through customs. But why do I need to pick up my bag, leave the airport, and go back into the airport?

Because a customs check is not complete if they can't also check your bag on demand?

[chrisseaton]

But it’s complete in other countries? I guess they pull you bag back out of the system if needed in other countries. Optimise for the common case if not needing to look in your bag.